136 results about "6LoWPAN" patented technology

A method is provided for registering a mobile router in an Internet Protocol version 6 over Low power Wireless Personal Area Network (6LoWPAN) network. The mobile router detects movement into a wireless network through the reception of a beacon message, and sends a Router Solicitation (RS) message requesting registration in the wireless network to a gateway. The gateway acquires an address of the mobile router from the RS message, stores the acquired address, assigns a new address to be used in the wireless network to the mobile router, and sends a Router Advertisement (RA) message with assigned address information and gateway address information, to the mobile router. The mobile router acquires the assigned address information and the gateway address information from the RA message.

The invention discloses an IPv6 over low power wireless personal area network (6LoWPAN) neighbor discovery-based tree routing method, which relates to the field of wireless sensor networks and comprises the following steps of: a, when a 6LoWPAN sensor node is added into the network, establishing a root node of tree topology, and configuring the basic information of the network to the root node; b, adding other ordinary nodes into the network; and c, forming routing. Moreover, the step c comprises the following steps of: under any one of the three conditions of leaf node invalidation or leaving, non-leaf node invalidation or leaving and node movement, triggering a routing restoring process; and under any one of the three conditions of no leaf node invalidation or leaving, no non-leaf node invalidation or leaving and no node movement, finishing the processing. In the 6LoWPAN neighbor discovery-based tree routing method, an additional routing protocol message is not required to be transmitted and received, so the bandwidth and the routing calculation overhead are reduced, energy consumption produced in the message transmission of the nodes is saved, and the energy consumption and routing overhead of the whole network are further reduced.

The invention discloses a 6LoWPAN smart home system and a method for achieving the same. The system comprises a USB embedded gateway, a plurality of bottom units communicating with the USB embedded gateway through a 6LoWPAN network and a control terminal communicating with the USB embedded gateway in a wired or wireless way. The USB embedded gateway receives data information from the bottom units and uploads the data information to the remote control terminal and receives control information of the remote control terminal and issues the control information to the corresponding bottom units to perform remote control. The communication protocol among the bottom devices, the USB embedded gateway and the remote control terminal is that the uploaded data frame format is divided into three classes: sensor alarm data frames, energy consumption data frames and control feedback data frames, and the issued data frame format is control data frames. The system is simple in structure, high in compatibility, convenient to use, low in cost and easy to extend.

The invention discloses a method for communicating a terminal of the internet of things with a host of the internet on the basis of IPv6 (internet protocol version 6). The method includes adding 6lowpan protocol into a protocol stack of the terminal of the internet of things to match data packets, namely supporting the network layer by the 6lowpan protocol and the IPv6 protocol; and utilizing 802.15.4 of IEEE (institute of electrical and electronic engineers) to perform data communication with a gateway on a link layer, realizing lightweight data packet transmission of the link layer in the lowpan area via the 802.15.4 protocol, utilizing the UDP (user datagram protocol) and the ICMP (internet control messages protocol) on a transmission layer of the terminal of the internet of things, and subjecting the gateway and the host of the internet to data communication via the Ethernet. A context active updating mechanism is realized in the terminal of the internet of things and is used for the process that the IPv6 host in the internet actively access to the terminal of the internet of things in the lowpan area, and meanwhile, the process of the terminal of the internet of things that data are actively reported to the host of the internet is provided, and the problem about mutual communication and connection between the terminal of the internet of things and the host of the internet is solved.

The invention discloses a distributed Web-based device and a method for testing the consistency of a 6LoWPAN protocol. The device comprises a central management server, Web testing servers, comprehensive testing instruments and auxiliary testing devices; a testing instruction is generated by an testing operator at a distant end via testing demands input by the Web testing server and combined with abstract testing sets, and meets the communication protocol of a wired network; and a device to be tested executes the testing instruction with the help of the virtual auxiliary testing devices and generates a testing report. According to the invention, protocol conversion from the wired network and the wireless network of the testing instruction is achieved, the testing operator can complete the test to the wireless network at the distant end via the wired network, and browses the test result via the wired network.

The invention discloses a LoWPAN (low-power wireless personal area network) node secure access control method based on neighbor discovery. The LoWPAN node secure access control method based on neighbor discovery solves the problem of communication security of 6LoWPAN (IPv6over LoWPAN) links. By means of optimization on RS (router solicitation) and RA (router advertisement) messages in a router discovery protocol, security authentication when new nodes are added into a network is achieved effectively, and whether the messages in the network are tampered or not is detected. By means of secure access control of a new node, an authentication address IP (internet protocol) list is maintained commonly within a network range, and attack and masking of malicious nodes can be prevented within the whole network range. The LoWPAN node secure access control method based on neighbor discovery has the advantages that the method is put forward based on an NDP (neighbor discovery protocol) of the 6LoWPAN, redefining new protocol types is not needed, and the method is higher in extendibility, easier to popularize and particularly applicable to sensor networks limited in resource energy.

The invention discloses a redundancy method of an IPv6 router suitable for a tree type wireless sensor network, and belongs to the technical field of the wireless sensor network. Based on 6LoWPAN and the tree type routing technology of the wireless sensor network, an IPv6 neighbor discovery protocol is modified according to the 6LoWPAN series protocol standard. The router establishes a self redundancy router from a neighboring router by combining the characteristic of dense deployment of nodes of the industrial wireless sensor network, and when the router does not work, the redundancy router acts on behalf the router transparently to carry out data routing forwarding work. Meanwhile, when the router out of operation recovers a normal working state, the redundancy router automatically stops the proxy work. The redundancy method of the IPv6 router suitable for the tree type wireless sensor network can effectively solve the problem that descendant nodes can not communicate due to failure of the router in the tree type network, thereby realizing the IPv6 wireless sensor network routing technology simultaneously meeting the requirements for reliability, real time performance and small expenditure of industrial application, and improving the overall reliable communication capacity of the network.

The invention discloses a 6LoWPAN-based intelligent fire-fighting service system for colleges and universities and a design method of the 6LoWPAN-based intelligent fire-fighting service system. The service system comprises a data acquisition layer, a data transmission layer, a data control layer and a system application layer, good interoperability of the 6LoWPAN can solve information isolation, the 6LoWPAN supports the intercommunication with other IEEE (Institute of Electrical and Electronic Engineers) 802.15. 4 equipment and supports the interconnection with other IP networks; through designing a data control layer based on fire-fighting big data, intelligentized analysis of data, intelligent control on fire-fighting equipment, a visual service platform is established; through analyzingand mining fire-fighting big data, the fire situation is predicted and a solution is formulated, the fire prevention and control efficiency is improved, the intelligence of a service platform is realized, the purposes of equipment management centralization, fire-fighting construction underlying data management intellectualization and management system platformization are achieved, and the systemhas the characteristics of high feasibility, convenience in networking and easiness in maintenance and upgrading.

The invention relates to an IPv6 wireless sensor network multipath transmission method based on an RPL routing protocol and belongs to the technical field of a wireless sensor network. According to the method, in a 6LoWPAN wireless sensor network based on an IPv6 technology, through utilization of the RPL protocol, a father node set generated when routing is carried out is established according to a hop count value from a source node to a sink node and node residual energy, a message is copied to obtain multiple copies according to a reliability demand of a message and a Rank value of the father nodes, and the message copies are distributed to a plurality of RPL father nodes for forwarding. According to the method, in order to enable the 6LoWPAN wireless sensor network to support multipath message transmission, a new 6LoWPAN head--a multipath head is designed in an adaption layer, and the multipath head is used for copying the message to multipath transmission and finally eliminating the message. According to the method, through increase of redundant paths when the message is transmitted, the message transmission reliability in the network can be improved; and when transmission paths are selected, the node residual energy and the hop count from the source node to the sink node are taken into consideration, so the life time of the network can be effectively prolonged.

The invention provides an IPv6-based wireless sensor network and Internet multi-gateway interconnection scheme. An IPv6 wireless sensor network complies with a 6LoWPAN (IPv6 over Low power Wireless Personal Area Networks) standard. The IPv6-based wireless sensor network and Internet multi-gateway interconnection scheme comprises the steps that a root-LBR serving as a root gateway and a plurality of LBRs serving as ordinary gateways are introduced in existing 6LoWPAN, and an IP internetwork route with an extended RPL routing algorithm is adopted in the 6LoWPAN, an IP tunnel scheme is adopted between the root-LBR and the LBRs to achieve IP wired high-speed communication between the root-LBR and the LBRs, and then network interconnection and routing between the IPv6 wireless sensor network and the Internet of the former level are conducted through the root-LBR in a unified mode. According to the IPv6-based wireless sensor network and Internet multi-gateway interconnection scheme, the power consumption of a wireless IP gateway is reduced, nodes of the wireless gateway achieve load sharing, the network lifetime is prolonged, the capacity of internetwork connection is improved, and interconnection delay is reduced.

The invention provides a 6LoWPAN (6Low-power Wireless Personal Area Network)-based energy-saving data transmission method for a wireless sensor network. An optimal TAN (Temporary Assembling Node) needs to be found between an information source and an information sink; firstly, the information source divides an IPv6 (Internet Protocol Version 6) into fragmentations, then transmits the fragmentations to the TAN one by one through a method of MUR, namely Mesh-under Routing, of the 6LoWPAN protocol; and the TAN assembles together the received fragmentations to the original IPv6 data packet, then fragments the IPv6 data packet, and transmits the fragmentations to the information sink node one by one through the MUR. Therefore the total energy consumption of the node transmitting data packet is reduced. The method of finding the TAN is the key of the invention, and the core of the invention is formula (19). By adopting the method provided by the invention, the energy consumption of the node transmitting data packet, the retransmission times of the data packet and the communication delay-time in the wireless sensor network are all reduced.

The invention relates to the network technology. In order to support moving of a mobile subnet of a small scale or a medium scale, the technical scheme includes that a network mobility management method of an internet protocol version 6 over low power wireless personal area network (6LoWPAN) includes the following steps that: (1) an entity (an agent mobile router) is disposed on a router position on the network edge of the 6LoWPAN; (2) a mobile access anchor point entity is added in a communication frame; (3) a mobile network moves to a new 6LoWPAN domain and then registers an obtained new care-of address, a home address and a network prefix with a private mobile radio (PMR); (4) the PMR sends an own care-of address and associated information of the network prefix of the mobile network to a domain name server (DNS) of a home domain where the mobile network is located, and sends the associated information to a home agent of the mobile network; and (5) a mobile network node and an objective communication node transmit data through transshipment of the PMR of a foreign domain where the mobile network is located, and achieve mutual two way communications. The network mobility management method of the 6LoWPAN is mainly used for network communications.

The invention discloses a protocol consistency test instrument of an internet protocol version-6 (IPv6) over low-power wireless personal area network (LoWPAN). The instrument comprises a main control module, a protocol stack module and a radio frequency module, wherein the main control module comprises a test sub-module, a system integration sub-module and a human-computer interface sub-module; the protocol stack module is in communication connection with the main control module and the radio frequency module and used for providing protocol support for communication of the protocol consistency test instrument; and the radio frequency module comprises a radio frequency transmission sub-module and a radio frequency receiving sub-module. By adoption of the protocol consistency test instrument of the 6LoWPAN provided by the invention, the protocol consistency of the 6LoWPAN can be tested. Moreover, the radio frequency module is applicable to the protocol consistency test instrument of the 6LoWPAN, all frequency coverage ranges can be supported, and the advantage of cost performance of a desk type personal computer (PC) is perfectly combined with the necessary expansion of a peripheral component interconnect (PCI) bus in the field of instruments, so that the development cost of the instrument is reduced, and the performance of the instrument is improved.